Chicago serves as one of the United States’ top tech hubs, helping drive innovation for a number of tech industries, including cybersecurity.
The city’s digital tech sector — which factors in cybersecurity roles — saw over $39 billion in economic output and over 99,000 employed in 2024. According to CyberSeek, the Chicago-Naperville-Elgin area specifically accounted for more than 13,000 of Illinois’ 19,400 total cybersecurity-related job openings in 2025, highlighting the city’s impact on making Illinois a top ranked state for cybersecurity talent.
Here are the cybersecurity companies making the Windy City a major U.S. cybersecurity hub.
Top Cybersecurity Companies in Chicago
- Cisco
- Darktrace
- Fortinet
- IBM
- LevelBlue
- Microsoft
Top Cybersecurity Companies in Chicago
Headquarters: San Jose, California
Founded: 1984
Cisco develops networking, security and computing solutions designed to support organizational connectivity and technology deployment. For cybersecurity, Cisco provides firewalls, threat intelligence services and security software to protect users, devices, cloud environments and network infrastructure.
Headquarters: Cambridge, United Kingdom
Founded: 2013
Darktrace offers an AI-native cybersecurity platform designed to spot novel threats across an entire organization and defend against various cyber attacks, including ransomware, phishing and insider threats. The platform provides defense across network, email, cloud, AI, operational technology (OT), identity and endpoint environments.
Headquarters: Sunnyvale, California
Founded: 2000
Fortinet delivers converged networking and security solutions to protect enterprises, service providers and government organizations worldwide. Utilizing its AI-powered operating system, Fortinet’s platform provides automated protection across network, unified SASE and security operations.
Headquarters: Armonk, New York
Founded: 1911
IBM creates enterprise software, hybrid cloud infrastructure and business consulting services to help clients solve operational challenges. The company also develops cybersecurity hardware and software for cloud recovery, data encryption and protection, mobile device security and more.
Headquarters: Plano, Texas
Founded: 2024
LevelBlue is a managed security services provider (MSSP) that offers AI-powered threat detection, response and consulting services to secure hybrid and regulated digital environments. It provides managed network and cloud security, data security, email security and incident response solutions to help organizations identify and mitigate security risks.
Headquarters: Redmond, Washington
Founded: 1975
Microsoft develops a range of technology products and services, including personal computers, gaming consoles and productivity software. It also provides security solutions such as threat detection, identity and access management and data governance products to safeguard AI, cloud, app and other digital environments.
Headquarters: Wilmington, Delaware
Founded: 1899
CSC provides compliance, administration and risk management solutions, including digital brand and cyber risk protection. The company’s cybersecurity services include intelligence monitoring, digital asset security and brand and phishing enforcement for organizations. CSC has an office in Chicago’s Buffalo Grove suburbs, along with an office above Union Station downtown.
Headquarters: Chicago, Illinois
Founded: 2013
Rippleshot employs advanced analytics and machine learning to understand a credit card user’s spending patterns and quickly detect when a card has been compromised. Once fraud has been detected, the company’s algorithms search for patterns across all compromised cards to find out where and when the compromise occurred, protecting customers from fraud.
Headquarters: Chicago, Illinois
Founded: 2009
NowSecure is a mobile security company that offers mobile app security testing, incident response and compliance services. It works with some of the world’s largest financial institutions and with organizations in healthcare, defense, energy and manufacturing.
Headquarters: Downers Grove, Illinois
Founded: 1982
Sentinel Technologies is an IT services provider for cloud, business optimization, subscription and IT lifecycle solutions that help build and manage organizational infrastructure. Along with its Fortis portfolio, the company offers cybersecurity solutions for threat investigation, security posture reports, endpoint security, lateral security design and emergency incident response.
